diff options
Diffstat (limited to 'roms/u-boot/arch/riscv/lib/interrupts.c')
| -rw-r--r-- | roms/u-boot/arch/riscv/lib/interrupts.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/roms/u-boot/arch/riscv/lib/interrupts.c b/roms/u-boot/arch/riscv/lib/interrupts.c new file mode 100644 index 000000000..7525c152b --- /dev/null +++ b/roms/u-boot/arch/riscv/lib/interrupts.c @@ -0,0 +1,152 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2016-17 Microsemi Corporation. + * Padmarao Begari, Microsemi Corporation <padmarao.begari@microsemi.com> + * + * Copyright (C) 2017 Andes Technology Corporation + * Rick Chen, Andes Technology Corporation <rick@andestech.com> + * + * Copyright (C) 2019 Sean Anderson <seanga2@gmail.com> + */ + +#include <common.h> +#include <efi_loader.h> +#include <hang.h> +#include <irq_func.h> +#include <asm/global_data.h> +#include <asm/ptrace.h> +#include <asm/system.h> +#include <asm/encoding.h> + +DECLARE_GLOBAL_DATA_PTR; + +static void show_efi_loaded_images(uintptr_t epc) +{ + efi_print_image_infos((void *)epc); +} + +static void show_regs(struct pt_regs *regs) +{ +#ifdef CONFIG_SHOW_REGS + printf("\nSP: " REG_FMT " GP: " REG_FMT " TP: " REG_FMT "\n", + regs->sp, regs->gp, regs->tp); + printf("T0: " REG_FMT " T1: " REG_FMT " T2: " REG_FMT "\n", + regs->t0, regs->t1, regs->t2); + printf("S0: " REG_FMT " S1: " REG_FMT " A0: " REG_FMT "\n", + regs->s0, regs->s1, regs->a0); + printf("A1: " REG_FMT " A2: " REG_FMT " A3: " REG_FMT "\n", + regs->a1, regs->a2, regs->a3); + printf("A4: " REG_FMT " A5: " REG_FMT " A6: " REG_FMT "\n", + regs->a4, regs->a5, regs->a6); + printf("A7: " REG_FMT " S2: " REG_FMT " S3: " REG_FMT "\n", + regs->a7, regs->s2, regs->s3); + printf("S4: " REG_FMT " S5: " REG_FMT " S6: " REG_FMT "\n", + regs->s4, regs->s5, regs->s6); + printf("S7: " REG_FMT " S8: " REG_FMT " S9: " REG_FMT "\n", + regs->s7, regs->s8, regs->s9); + printf("S10: " REG_FMT " S11: " REG_FMT " T3: " REG_FMT "\n", + regs->s10, regs->s11, regs->t3); + printf("T4: " REG_FMT " T5: " REG_FMT " T6: " REG_FMT "\n", + regs->t4, regs->t5, regs->t6); +#endif +} + +static void _exit_trap(ulong code, ulong epc, ulong tval, struct pt_regs *regs) +{ + static const char * const exception_code[] = { + "Instruction address misaligned", + "Instruction access fault", + "Illegal instruction", + "Breakpoint", + "Load address misaligned", + "Load access fault", + "Store/AMO address misaligned", + "Store/AMO access fault", + "Environment call from U-mode", + "Environment call from S-mode", + "Reserved", + "Environment call from M-mode", + "Instruction page fault", + "Load page fault", + "Reserved", + "Store/AMO page fault", + }; + + if (code < ARRAY_SIZE(exception_code)) + printf("Unhandled exception: %s\n", exception_code[code]); + else + printf("Unhandled exception code: %ld\n", code); + + printf("EPC: " REG_FMT " RA: " REG_FMT " TVAL: " REG_FMT "\n", + epc, regs->ra, tval); + /* Print relocation adjustments, but only if gd is initialized */ + if (gd && gd->flags & GD_FLG_RELOC) + printf("EPC: " REG_FMT " RA: " REG_FMT " reloc adjusted\n", + epc - gd->reloc_off, regs->ra - gd->reloc_off); + + show_regs(regs); + show_efi_loaded_images(epc); + panic("\n"); +} + +int interrupt_init(void) +{ + return 0; +} + +/* + * enable interrupts + */ +void enable_interrupts(void) +{ +} + +/* + * disable interrupts + */ +int disable_interrupts(void) +{ + return 0; +} + +ulong handle_trap(ulong cause, ulong epc, ulong tval, struct pt_regs *regs) +{ + ulong is_irq, irq; + + /* An UEFI application may have changed gd. Restore U-Boot's gd. */ + efi_restore_gd(); + + is_irq = (cause & MCAUSE_INT); + irq = (cause & ~MCAUSE_INT); + + if (is_irq) { + switch (irq) { + case IRQ_M_EXT: + case IRQ_S_EXT: + external_interrupt(0); /* handle external interrupt */ + break; + case IRQ_M_TIMER: + case IRQ_S_TIMER: + timer_interrupt(0); /* handle timer interrupt */ + break; + default: + _exit_trap(cause, epc, tval, regs); + break; + }; + } else { + _exit_trap(cause, epc, tval, regs); + } + + return epc; +} + +/* + *Entry Point for PLIC Interrupt Handler + */ +__attribute__((weak)) void external_interrupt(struct pt_regs *regs) +{ +} + +__attribute__((weak)) void timer_interrupt(struct pt_regs *regs) +{ +} |